Health care · County · Illinois
Optometrists and eye clinics in Knox County, IL
Competitor counts, household spending and official business counts for optometrists and eye clinics in Knox County, IL, set against other counties and the U.S.
Groundwork market score · out of 100
Score 21 out of 100: Low
Ranked #1,194 of 1,302 scored counties
#45 of 46 scored counties in Illinois
- Listings
- 13
- 2 chain locations (15%)
- Official establishments
- n/a
- Fewer than 3, or not published
- Household spending a year
- $25.8M
- On medical and dental services · $1,231 a household
- Spending per listing
- $2M
- 37% below the U.S.
- Listings per 10k households
- 6.2
- 51% above the U.S.
- Population, 2025
- 47,767
- −4.1% since 2020
See the optometrists and eye clinics around any address in Knox County
The site report maps the optometrists and eye clinics on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of Knox County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Knox County scores 21 (low) on the Groundwork market score for optometrists and eye clinics, ranking #1,194 of 1,302 scored counties and #45 of 46 scored counties in Illinois. That puts it in the bottom quarter of counties.
At $1,231 per household (4% below the U.S. average), households in Knox County spend about $25.8M a year on medical and dental services. That is about $2M of household spending for each practice on map listings, 37% below the U.S. figure of $3.1M. The spending figure covers all medical and dental services, not only optometrists and eye clinics.
There are 13 optometrists and eye clinics on map listings in Knox County as of September 2026. Chain locations make up 15% of them, against 20% across the U.S. That is 6.2 per 10,000 households, 51% above the U.S. rate of 4.1.
Official counts don’t publish a figure for offices of optometrists in Knox County, since they leave out counts under 3. Population estimates show Knox County declined 4.1% from 2020 to 2025, against +3.1% for the U.S.
How Knox County compares
The same measures for Illinois and the whole U.S. Spending per listing divides a year of household spending on all medical and dental services by the optometrists and eye clinics counted, so it measures the demand for each competitor, not any business’s revenue. Households per establishment does the same with the official count.
| Measure | Knox County | Illinois | U.S. |
|---|---|---|---|
| Listings per 10k households | 6.2 | 4.6 | 4.1 |
| Spending per listing | $2M | $3.3M | $3.1M |
| Households per official establishment | n/a | 5,802 | 5,742 |
| Official establishment growth, 2019–2023 | n/a | +3.1% | +0.2% |
| Population growth, 2020–2025 | −4.1% | −0.6% | +3.1% |
| Spending per household on medical and dental services | $1,231 | $1,517 | $1,288 |
| Median household income | $57,030 | $83,390 | $80,734 |
| Groundwork market score | 21 | 53 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- n/a
- Employees, 2023
- n/a
- Annual payroll, 2023
- n/a
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 132 chain locations
- Listings at the U.S. rate for this spending
- 8The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as offices of optometrists in Knox County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in Knox County
- Population, 2025 estimate
- 47,767−4.1% since 2020
- Households
- 20,972
- Median age
- 42.6
- Homes lived in by their owners
- 71%
- Vehicles per household
- 1.7
- Land area
- 716 sq. mi.
- People per square mile
- 68
- Median household income
- $57,030+29.2% vs. 2015–2019, before inflation
- Average household income
- $74,560
- Median home value
- $111,900
- Jobs located here
- 15,910
- Daytime population
- 44,318Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Knox County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the optometrists and eye clinics on map listings by name and distance.
Or open the report at the center of Knox County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardOptometrists and eye care across Illinois
Every Illinois market ranked →The highest-scoring counties in Illinois for optometrists and eye clinics, numbered among those based in Illinois, with Knox County marked.
Top counties in Illinois
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Kendall County, IL | 81 | 11 | 2.4 | $7M | +9.9% | #41 of 1,302 |
| 2McLean County, IL | 81 | 20 | 2.8 | $5.2M | +0.1% | #44 of 1,302 |
| 3Champaign County, IL | 79 | 24 | 2.8 | $4.8M | +1.8% | #64 of 1,302 |
| 4Sangamon County, IL | 78 | 23 | 2.7 | $5.3M | −1.0% | #76 of 1,302 |
| 5Tazewell County, IL | 75 | 18 | 3.3 | $4.3M | −0.9% | #123 of 1,302 |
| 6Rock Island County, IL | 72 | 15 | 2.4 | $5.5M | −1.7% | #156 of 1,302 |
| 7Kane County, IL | 72 | 92 | 5.0 | $3.3M | +1.8% | #172 of 1,302 |
| 8Vermilion County, IL | 69 | 6 | 2.0 | $6.3M | −3.7% | #209 of 1,302 |
| 9Will County, IL | 66 | 119 | 4.9 | $3.5M | +2.2% | #283 of 1,302 |
| 10Kankakee County, IL | 63 | 18 | 4.4 | $3.2M | −1.7% | #349 of 1,302 |
| 45Knox County, IL | 21 | 13 | 6.2 | $2M | −4.1% | #1,194 of 1,302 |
Other business types in Knox County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
- Doctors, dentists and clinics44
- Dentists and orthodontists60
- Primary care and pediatrics62
- Urgent care and walk-in clinics
- Chiropractors29
- Physical therapy58
- Optometrists and eye care21
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many optometrists and eye clinics are in Knox County, IL?
As of September 2026, map listings count 13 optometrists and eye clinics in Knox County. 2 of them (15%) are chain locations. The listings count optometrists and eye clinics. No official count is published for offices of optometrists in Knox County: counts under 3 are left out.
How much do households in Knox County, IL spend on medical and dental services?
About $25.8M a year, or $1,231 per household. That is 4% below the U.S. average (an index of 96, where 100 is the U.S. average). Spread across the 13 optometrists and eye clinics on map listings, it comes to $2M per practice. That spending covers all medical and dental services, which optometrists and eye clinics share with other businesses in the trade. It is estimated from the incomes of the 20,972 households in Knox County and national spending patterns by income.
How does Knox County, IL compare with the U.S. for optometrists and eye clinics?
Knox County has 6.2 optometrists and eye clinics per 10,000 households, 51% above the U.S. rate of 4.1. Spending per practice is $2M, 37% below the U.S. figure of $3.1M. At the U.S. ratio of optometrists and eye clinics to household spending, Knox County would have about 8, against 13 on map listings.
How fast is Knox County, IL growing?
Population estimates put Knox County at 47,767 people in 2025, down 4.1% since 2020, against +3.1% for the U.S. It has 20,972 households. Median household income in Knox County is $57,030, 29% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 29.2%, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. Knox County scores 21 for optometrists and eye clinics (low), #1,194 of 1,302 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Knox County. It maps the optometrists and eye clinics on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for optometrists and eye clinics · All 56 business types in Knox County
Screening a site or an acquisition in Knox County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of Knox County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.